ncurses 6.0 - patch 20170107

+ amend changes for tput to reset tty modes to "sane" if the program
  is run as "reset", like tset.  Likewise, ensure that tset sends
  either reset- or init-strings.
+ improve manual page descriptions of tput init/reset and tset/reset,
  to make it easier to see how they are similar and different.
+ move a static result from key_name() to _nc_globals
+ modify _nc_get_screensize to allow for use_env() and use_tioctl()
  state to be per-screen when sp-funcs are configured, better matching
  the behavior when using the term-driver configuration.
+ improve cross-references in manual pages for often used functions
+ move SCREEN field for use_tioctl() data before the ncursesw fields,
  and limit that to the sp-funcs configuration to improve termlib
  compatibility (cf:  20120714).
+ correct order of initialization for traces in use_env() and
  use_tioctl() versus first trace calls.